Speaking tube



Marh 6, 1928.

J. LEVY SPEAKING TUBE Filed llarch 4. 1927 mvE'NroR ATTORNEY Patented Mar. (i, i928.

JOSEPH LEVY, OF TULSA, OKLAHOMA.

SPEAKING TUBE.

Application nled March 4,

My said invention relates to a device in the nature o a speaking tube, or what l call a spealradoorf so arranged that under ordinary conditions it may be closed at both ends thus leaving no opening or apparent break or" any consequence in the walls or parti ions through which it may at times be desirable to speak. l/Vhen the device is 'to be used it can instantly be made open through ut its entire length and after use it can be so manipulated by the user as to close it at both ends and secure it against rca-opening. appropriate painting, etc., it can be made very inconspiouous. lt can readily be mounted in any situation Where it is to be used and, being extensible, it can be properly positioned regardless of the distance between the Walls, partitions, etc., separating the rooms 'which are to be placed in communication. Such extensibility is, of course, limited but permits considerable range of adjustment and thus does away With any cutting to lit, While it can be made in various sizes to provide for situations beyond the adjustable limit o the `preferred or conventional size.

Refering to the drawings, which are made a part o this application and in which similar reference characters indicate similar parts:

Fig. l is an elevation o' my device,

ll ig. 2, end elevation.

Fig. 3, an elevation oi the opposite end, and

Fig. ll, a longitudinal central section.

Referring to the drawings in 'further detail, numeral Si indicates partition Walls or the opposite sides of a Wall to which Wall plates if nel (3 are secured by means of screws 2 or lier suitable fastening means. A tube Llis Welded to the Wall plate 5 or otherwise secured thereto or may merely abut against the same. Another tube l5 is arranged similar relation to wall plate 6, the latter tube litting slidably in tube 4f. Doors 7 and 8 are pivot-ed respectively to the plates o o and are connected by a rod l1. A spring l2 is secured at one end to the rod ll and at the other end to a holder 14 which can be a lug.; on the plate 5 or may be separate therefrom and lined to the Wall 3, said spring tending to open the doors simultaneously. It will be noted that the 1927. Serial No. 172,897.

rod is pivotally secured to the doors 7 and 8 at 13 and l() respectively.

A pivoted catch l serves, when turned into the position indicated in Fig. 3, to hold the doors in closed position. A lug 9 coacts with door 8 to prevent the doors from being opened from the outsioe, said lug i'itting ina notch or depression in said door. The speakadooi may be installed either in the door casing or in the Wall adjacent thereto.

lt is thought that the operation of my device will be clear from the foregoing. lt vill be obvious to those skilled in the art that many changes may be made in my device all .Without departing from the spirit of my invention, the true scope of which is indicated in the appended claims. ln the claims specilic terms are used for ciearncss and not Yfor limitation, it being obvious that my device will serve not only as a speaking tube but, 'for example, also as a lool; out, asu/hen it is installed in a door jamb or in a Wall adjacent a door. ln such a location it is possible 'for a person on the inside not only to converse with the person on the outside but also to see the latter person.

Having thus 'fully described my said invention, what l claim as new and desire to protect by Letters Patent is:

l. A speaking tube having doors at opposite ends, and connections independent of the tube from one door to the other for :urtuating them simultaneously.

2. A speaking tube having doors at opposite ends, connections between said doors, and a spring acting on such connections to move the doors in one direction.

3. A speaking tube having doors at opposite ends, a rod connecting said doors, a spring tending to open said doors, and means for securing the doors in closed posi* tion.

A speaking tube for use in a Wall having alA openings, said tube comprising telescoping tubular members for convenient assembly7 doors at the opposite ends ol' the tube, and a rod connecting the doors for operating them simultaneously.

.ln testimony whereof I aiix my signa ture.

JOSEPH LEVY.

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